One of the worst shooters I have played on Kongregate. It is frustrating, boring, and even though i got damage combos in the 30k range without being hit I still don't have the card for it.
The difficulty of each wave varies far too much. Even on the easy setting the 1st wave is super easy but then the 2nd wave a few get by. It seems that every other wave is too difficult in my opinion. Nice concept though